| Zip Code | Primary City | Secondary City | | 17701 | Williamsport | Williamsport, Barbours, Center City, Grampian Hls, Grimesville, Heshbon Park, Loyalsock, Newberry, Old Lycoming, Plunketts Crk, Proctor, Towncrest Vlg, Vallamont Hls, Warrensville, Faxon | | 17702 | Williamsport | Williamsport, Oval, Armstrong, Bastress, Collomsville, Duboistown, Nisbet, S Williamspor, S S Williamsprt, South Sylvan Dell | | 17703 | Williamsport | | | 17705 | Williamsport | Bro Dart |
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